however I'm not sure what is the modem IP since the default gateway (which should be the modem IP anyway) is 0.0.0.0. on my PC when I connect without the DD WRT router (the internet is working fine then).

Here is the setup

I want to note that the WAN IP's last digit changes sometimes (on PC too when I'm connected without the DD WRT router)

Could somebody tell me what's going on here?
Thank you very much.

edit:
Now I did ipconfig/all instead of ipconfig and I see that the DNS is 10.150.150.1, maybe that's the IP of the modem?

However if I set nvram get wan_ifname`:0 10.150.150.111, maybe somebody in this building has or will have that IP? That would probably be a problem then?

were you able to pass PPPOE authentication over to your DD-WRT device, given you do not have access to it? Also given your description do you even have the PPPOE authentication details (username/pwd) from the DSL ISP?

Once upon a time I had to change settings/config on my 2 wire modem/router wifi a/b device. Only then would my dd-wrt device(plugged into the "AT&T modem/router give away") have to/be able to handle WAN facing PPPOE authentication...

Can you describe the general setup & why you don't have access to the modem combo device?

Also that device you don't have access to, exactly what is it? you may need access & to attempt to set it to pass PPPOE authentication over to DD-WRT (but wouldn't that force you to let all other users onto your network? at a minimum you would have cut off their WAN/LAN connection.)

assuming a dorm or apartment situation:
why can't you reset your dd-wrt device, leave wan connection = "automatic configuration DHCP" and create your own little private network behind the modem/router combo... just using your RJ45 jack on the wall. Are you trying to achieve a DDNS config? if so for what purpose?

were you able to pass PPPOE authentication over to your DD-WRT device, given you do not have access to it? Also given your description do you even have the PPPOE authentication details (username/pwd) from the DSL ISP?

I don't have PHYSICAL access to the modem (because it's in a room I don't have access to) but sure I have PPPOE username and password and it works fine when I connect to the modem from PC (without DD WRT).

jheide44 wrote:

Can you describe the general setup & why you don't have access to the modem combo device?

I can't access the device because this is not a home-connection. I'm in a building where I share that internet connection with other people.

However I know it is possible to use a router with that network.

To make this clear,

I have physical access to the DD-WRT router which is mine and I can do everything with it.
I don't know what is the device that LAN cable is coming from.

My bad... I am not familiar with that type of PPPOE deployment. (And it has been many years since I studied/was tested on the OSI model... I am so old, we learned 10BASE2 & 5 lol... Old dog new tricks)

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